| # |
| # Copyright (C) 2022 The Android Open-Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| # This file enables baseline features, such as io_uring, |
| # userspace merge, etc. But sets compression method to none. |
| # This .mk file also removes snapuserd from vendor ramdisk, |
| # as T launching devices will have init_boot which has snapuserd |
| # in generic ramdisk. |
| # |
| # T and U launching devices should include this .mk file, and configure |
| # compression algorithm by setting |
| # PRODUCT_VIRTUAL_AB_COMPRESSION_METHOD to lz4, gz or brotli. Complete |
| # set of supported algorithms can be found in |
| # system/core/fs_mgr/libsnapshot/cow_writer.cpp |
| |
| PRODUCT_VIRTUAL_AB_OTA := true |
| |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.enabled=true |
| |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.enabled=true |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.userspace.snapshots.enabled=true |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.io_uring.enabled=true |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.xor.enabled=true |
| PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.batch_writes=true |
| |
| # Enabling this property, will improve OTA install time |
| # but will use an additional CPU core |
| # PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.threads=true |
| ifndef PRODUCT_VIRTUAL_AB_COMPRESSION_FACTOR |
| PRODUCT_VIRTUAL_AB_COMPRESSION_FACTOR := 65536 |
| endif |
| |
| PRODUCT_VIRTUAL_AB_COMPRESSION := true |
| PRODUCT_VIRTUAL_AB_COMPRESSION_METHOD ?= none |
| PRODUCT_PACKAGES += \ |
| snapuserd \ |
| |